What causes "chaincode name should not be empty" in hyperledger/fabric?

Ensure every chaincode entry has a Name set before validating

chaincode name should not be empty

Error message

chaincode name should not be empty

What it means

ValidateInvocationChain iterates over the chain's chaincode entries and requires each one to have a non-empty Name. A ChaincodeCall with an empty Name cannot be resolved to a chaincode by the discovery service, so the library rejects it before a request is sent. This protects against partially initialized ChaincodeCall structs.

Source

Thrown at discovery/client/client.go:634

}

// InvocationChain aggregates ChaincodeCalls
type InvocationChain []*peer.ChaincodeCall

// String returns a string representation of this invocation chain
func (ic InvocationChain) String() string {
	s, _ := json.Marshal(ic)
	return string(s)
}

// ValidateInvocationChain validates the InvocationChain's structure
func (ic InvocationChain) ValidateInvocationChain() error {
	if len(ic) == 0 {
		return errors.New("invocation chain should not be empty")
	}
	for _, cc := range ic {
		if cc.Name == "" {
			return errors.New("chaincode name should not be empty")
		}
	}
	return nil
}

View on GitHub (pinned to 2736b63f8f)

Solutions

Ensure every chaincode entry has a Name set before validating
Validate the config/flag sourcing the chaincode name (reject empty strings early)
Print/log the chain contents to find the entry with the missing name

Example fix

// before
chain := discovery.InvocationChain{{Name: ccName}} // ccName == ""
// after
if ccName == "" {
    return errors.New("chaincode name required")
}
chain := discovery.InvocationChain{{Name: ccName}}

Defensive patterns

Strategy: validation

Validate before calling

for i, cc := range chain {
    if cc.Name == "" {
        return fmt.Errorf("invocation chain entry %d has no chaincode name", i)
    }
}

Type guard

func namedChaincodes(chain discovery.InvocationChain) bool {
    for _, cc := range chain {
        if cc.Name == "" {
            return false
        }
    }
    return true
}

Try / catch

if err := chain.ValidateInvocationChain(); err != nil {
    if strings.Contains(err.Error(), "name should not be empty") {
        log.Printf("check chaincode name inputs: %v", err)
    }
    return err
}

Prevention

Reject empty chaincode-name flags/config values at startup
Default chaincode names in one place rather than scattered call sites
Add a smoke test that validates the assembled chain

When it happens

Trigger: Calling ValidateInvocationChain() when the InvocationChain contains an entry whose Name field is "" — e.g. `discovery.InvocationChain{{Name: ""}}` or a ChaincodeCall built from an unset variable.

Common situations: Populating chaincode names from CLI flags, env vars, or config that were left blank; JSON/config unmarshalling that left Name zero-valued; typo'd struct field assignment.

Understand the failure class

Background: "missing required argument" and "the following required arguments were not provided": what required-argument errors mean and how to fix them — this error's family across 20 libraries.

Related errors

AI-assisted analysis of hyperledger/fabric@2736b63f8f (2026-09-04). Data as JSON: /api/errors/1e8b4ae285209573. Report an issue: GitHub.